Spark-plug.



0. & G. BAYSDORFER.

'K PLUG.

, Patented June 27, 1916.

Be it known that we, OrroBYsnoRFnn andl GUs'rAvE BAXSDORF'ER, citizens ofthe vUnited States, residing-'at' Omaha', nthe countyl of. Douglas and lState, of Nebraska,

have invented certain new and .useful Improvements in Spark-Plugs, of which the following isv a. specication.

This invention relates to an improvement inV spark plugs for use in connection with' .internalcombustion engines, and has for its v l Ano-ther object is'the 'production of a greater heatthan ordinary for' the'electric avoided spark, in thepresence of compressed gas.

Other.- objects ofgthev invention relate .to Such a .construction that a comparatively quired for `operation .than usual, and that the .injury to, magnetos :and coilsoccurring occasionally during their use,.will be avoided.'` 'f l A The invention broadly includes the combination `of a-pair of electrodes each having a comparatively v Q eXtenSive, smooth area and aprojection, the electrodes being iso' arranged thatfthe smooth andextensive area of one electrode will.A b e disposed Aadjacent to and near the projectionof the other electrode, So that the electriccurrent, 'while alternating, will readily and uniformly. travel .ig-om one electrodeto the other.

In instances wheremagnetos'and their connections or' coils are employed for producing electrical. energy for actuating the sparking Ito cause ignition, irregular or Aintermittent action-of the spark plugs tends to injure the magneto o r coil so thatfrequent repairs are required,v @By ,use of the vherein describedfsparkplug, the delay and expense thus caused,. .ffor. the,. 1 nostpart,imay be l'Also .in! instances."'where[electricl ,f ef;e11p1.0yed,.theff Connefins j ..are:sometime scarelessly ref versed by ari operator, so'thatgclosures of the electrical current nare madewithfdiibatteri culty. It is considered of the spark plug described herein,"no inconvenience or defect in operation whatever will arise byreason of any cha-nge in polarity of the batteries.

It is understood that, in the construction ratenteuuunje 27;

spark plugs,lrtwoelectrodes heretoi ity of lprojections, have been provided.;.fory

one electrode and' disposed adjacent 'to' a companion 'electrode havingasmooth or plain surface so that thepelectric current could travel on ythe projection providing a passageway v off least Vresistance or greatest attr'actlon.; and forthe'same purpose a plurality of projections havebeenprovidedfo both electrodes ofva spark plug; and4 it is also understoodl that thesev constructionsf'are for use .only in instances ',.where there is'to ,be uniformity intravel'ffthe electric curjf` rent,fand if the'electric Yjitilariiayiri those fstructres v"should be changed, 'their opera?. tionfwouldvbe defective for" the 'reason' thatA theelectric circuity cduld n'otbe completed lvvi'thieqiial facility in both directions.'d less 'amount of electrical energy will be re- VKwhere two electrodes were mounted to eX- `tend within aglass receptacleso that spark- By a vrecently conducted "experiment,"

ing `.could be observed, said receptaclev con.- talmng air under pressure and the electrodes being energized by av magneto, saidv electrodes being zonstr'ucte'd -substantially as shown in the present drawings, it was 'clis' coveredthat the electric sparking occurred in`alternation, or in other words itjoccurr'ed between the .projectionfoffa vfirst electrode and the s m ooth' surface of asecondelectrede, andA lnent` v'between the proj ction"l of the Vsecond electrode and'thefsmopth'surface betweenftwo electrodesfregardles's tli polarity of .the electrical supply;

`the

combination' and arrangement of` parts as n" lllustrating one embodie Figi@ is afbreken eti-forth@ insulated' electrode. Fig. 3 is an enlarged, broken away' detail, in section,

fied form of the invention.v

Referring now'to the drawing, numerals .Fie- 151110 shew the,

o illustrate a modidescribed herein and'vclainied, 'andasillusl R21-Wiredifarlgawhefe-- 4 in the several views, indicate a part of a cylinder of an internal combustion engine in which is mounted a plug or cylindrical ,bushing 5 called, for.convenience of 'deor'envelop 7, being disposed centrally of the an'rular wall 8 of the ground electrode and provided, as' shown in Figs. 1' and.2, .with a ball or member 9 lhaving a smooth and preferably convexed surface, andalso provided with a prong or projection 10 ex' tending in a direction of the annuiar Wall 8. Numeral 11 indicates aA projection with which the annular wall 8 is provided, and

which extends` in a direction ofmember 9.

It will be understood that if a magneto is employed for providing electrical energy, the electrodes positive electricity in alternation. Inoperation, when the electrode 5 is charged With positive electricity, the spark will occur bel tween the projection 11 and the convexed surface of member 9, and x.vhen the electrode 6 is charged with positive electricity, the spa-rk will occur between the'projection 10 and the adjacent smooth surface 8 of the electrode 0n account of the construction thus provided, the sparking, regardless of the degree of compression of the gas, vvill be efectedivithout intermitting and will be intensified, injury to the magneto or coil will be 'prevented and a very limited voltage,

only, will be required for operation.

Fig. 3 illustrates a modified form of the invention, wherein the electrode 6 is provided with atransverse arm 12, one end thereof having a ball or convexed member 9 mounted thereon and disposed adjacent to theprojection 11 of the annular Wall 8, its 'opposite' end being provided with a tapered part 10 adapted to be disposed adjacent to the smooth surface o f Wall 8, and by use of this Aconstruction it is obvious that operation would be substantially the same as alreadyl described. j

While we have described construction in detail, We'do not Wish to be understood as limiting ourselves in this respect, nor to size, form, proportion or material to be employed, since the scope of the invention is determined by the claims.

'1. In a'spark plug for engine cylinders, the combination of a Vfirst electrode having an annular chamber in communication with a cylinder and provided with. an an gular projection extending inwardly of said cham'- ber, an insulated electrodelhaving a convexed 5 and 6 will be charged with,

part disposed centrally of thef'annular chamber of.' the first electrode adjacent to the angular projection of said irst electrode, said convexed part of the insulated electrode being provided With an angular projection extending outwardly of its surface to be disi posed adjacent to the wall of the annular chamber of the i'rst electrode.

2. A spark plug, including a pair of electrodes each having a smooth surface with an angularly projecting part, said electrodesbeing disposed adjacent to each other, the angularly projecting part of the smooth surface of each electrode extending toward the smooth surface of the adj acent electrode.

3. In combination, a ground electrode having a concaved area with an angular projection, `an insulated electrode having a convexed area With-an angular projection, said electrodes being disposed adjacent to each other, the angular projection -of the ground electrode extending toward the convexed area of the insulated electrode and the angular projection ofthe insulated electrode extending toward the concaved area of the ground electrode.

4. In combmation, a ground electrode, an insulated electrode, each having, a smooth area with an angular projection, said electrodes being disposed adjacent to each other, the angular projection of the smooth area of each electrode extending toward the smooth area of the other electrode.

5. In a spark plug, the combination With a ground electrode having a ltransversely curved wall formed rectilinear throughout its length and provided With an angular projection extending inwardly thereof, of an insulated electrode having a smooth part disposed adjacent to the angular projection of the ground electrode and provided with an angular projection extending toward the transversely curved rectilinear Wall of the ground electrode.

6. In a spark plug, the combination with a ground electrode having -a transversely curved Wall provided With an angular projection extending inwardly thereof, said Wall having a uniform bore throughout its length, of an insulated electrode having a smooth part disposed adjacent to the angular proj ection of the ground electrode and provided with an angular projection extending to- Ward the wall ofthe ground electrode.

In testimony whereof, We have affixed our signatures in presence of tWo Witnesses.

OTTO BAYSDORFER. GIIS'IAVE BAYSDORF-ER. Witnesses:

HIRAM A. STURGES, ARTHUR H. Sruncns. 

